laser_measurement_instruments_catalog
.pdf
3.2.3 
BeamWatch™ Non-contact, Focus Spot Size and Position monitor for high power YAG and Fiber lasers
ֺInstantly measure focus spot size
ֺDynamically measure focal plane location during start-up
ֺFrom 1kW and up – no upper limit (So far we have measured up to 30kW)
ֺNon-contact, laser beam is completely pass-through
ֺAutomation Control Interface for System Integration
ֺGigE camera interface for local network installation
ֺPatent pending
BeamWatch™ utilizes disruptive technology to measure very high power lasers. By not intercepting the beam and yet providing instantaneous measurements,
you can now monitor the beam at frequent intervals without having to shut down the process or remove tooling and fixtures to get access. In addition, you can now measure focal spot location at millisecond intervals and know if there is any focal spot shift during those critical start-up moments.
Connection for filtered air
BeamWatch includes Technician and Operator modes:
ֺTechnician Mode: The technician has access to those tools needed for start-up and advanced beam diagnostics.
ֺOperator Mode: The run-time interface provides measurements at video rates with simple graphic display to quickly understand the status of laser performance without the need for user interaction.
Focus Spot Location |
Focus Spot Size |
Technician mode for set-up and beam diagnostics
Input Beam
Output Beam (Beam has not been touched)
3.2.3 Beam Analysis
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Focus Spot Size
BeamWatch images the full beam caustic measuring the waist at its smallest point, many times per second.
Focus Spot Location
Now you can precisely know the dynamic behavior of focal spot shift throughout the laser duty cycle. By inputting the known distance from the laser delivery head to a precise datum on BeamWatch the focal spot distance is constantly measured and tracked with millisecond updates.
3.2.3 Beam Analysis
Laser delivery head
Measured distance input by user
BeamWatch |
Focus spot location |
BeamWatch measures this distance
Assured Process Consistency
Measure as often as needed to assure repeatable and consistent
process uniformity. Mount BeamWatch into the process or manually insert BeamWatch and make periodic measurements.
You can also automatically compare to initial process validation measurements and utilize automated pass/fail.
Simplified operator mode
Automation Interface
Implement an Automation Server written in Visual Basic for Applications (VBA), C/C++ or by an application with support for ActiveX Automation, such as Microsoft Excel, Microsoft Word or National Instruments’ LabVIEW.
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Periodically measure and compare
Specifications
Model |
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BeamWatch |
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Wavelength |
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980-1080nm |
Min. Power Density |
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2MW/cm² |
Minimum Focus Spot |
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200µm |
Spot Size Accuracy |
±5% |
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Location Accuracy |
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±0.05 µm within the BeamWatch measurement window |
Max. Input/Output Beam Size |
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12.5mm maximum |
Communication to PC |
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GigE Ethernet |
Power |
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110AC |
Accuracy can be degraded by a variety of situations
Specification subject to change without notice.
Ordering
Item |
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Description |
P/N |
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BW-NIR-GP-151400 |
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BeamWatch non-contact, focus spot size and position monitor for high power YAG and Fiber lasers |
SP90335 |
Suggested Add-Ons |
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5000W |
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5kW water cooled power sensor |
7Z02754 |
10K-W |
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10kW water cooled power sensor |
7Z02756 |
30K-W |
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30kW water cooled power sensor |
7Z02757 |
100K-W |
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100kW water circulated power sensor for laser with an approximately Gaussian beam and fiber output |
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Juno |
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Compact module to operate one Ophir sensor from your PC USB port. |
7Z01250 |
Vega |
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Hand held color universal power meter |
7Z01560 |
3.2.3 Beam Analysis
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3.2.4.1 Beam Analysis
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3.2.4Cameras
3.2.4.1190-1100nm USB Silicon CCD Cameras
SP Series
Features
ֺUSB 2.0 compatible
ֺ64dB true system dynamic range - highest in the industry
ֺProgrammable high speed electronic shutter
ֺSpectral range: 190 - 1100nm
ֺGain adjustable to accommodate a wide range of input levels
ֺBuilt in optical trigger synchronizes with even the shortest laser pulses.
ֺSlim profile and multiple mounting options
Built-in photodiode trigger
SP503U/SP620U
L-Series
Features
ֺUSB 2.0 compatible
ֺ35mm format for large beams
ֺ59dB true system dynamic range
ֺSpectral range: 190 - 1100nm
USB L11059
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USB Cameras for use with Laptop or Desktop PC
Item |
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Specification |
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Model |
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SP503U |
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SP620U |
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Application |
½" format, slim profile, wide dynamic |
1/1.8" format, high resolution, wide |
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range, CW & pulsed lasers |
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dynamic range, pulsed lasers, CW |
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YAG, adjustable ROI |
Spectral Response |
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190 - 1100nm (2) |
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190 - 1100nm (2) |
Active Area |
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6.3mm W x 4.7mm H |
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7.1mm W x 5.4mm H |
Pixel spacing |
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9.9µm x 9.9µm |
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4.40µm x 4.40µm |
Number of effective pixels |
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640 x 480 |
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1600 x 1200 |
Minimum system dynamic range |
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64 dB |
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62 dB |
Linearity with Power |
±1% |
±1% |
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Accuracy of beam width |
±2% |
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Frame rates: In 12 bit mode |
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30 fps at full resolution |
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7.5 fps at full resolution |
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60 fps at 320x240 |
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28 fps at 640x480 |
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44 fps at 320x240 |
Shutter duration |
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30us to multiple frame times |
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Gain control |
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43:1 automatic or manual control |
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29:1 automatic or manual control |
Trigger |
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1. BNC connector accepts positive or negative trigger. LED on camera |
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indicates triggering. Will synchronize with laser repetition rates up to 1KHz. |
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Built in pre-trigger allows synchronization to even sub-nanosecond pulses |
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2. Same connector can provide trigger out to synch laser. |
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Supports programmable delay on Strobe Out |
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3. Same connector accepts photodiode trigger (see below) |
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Photodiode trigger |
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Optional photodiode trigger available: P/N SPZ17005 |
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Saturation intensity (1) |
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1.3µW/cm2 2.2µW/cm2 |
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2.2µW/cm2 |
Lowest measurable signal (1) |
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0.5nW/cm2 |
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2.5nW/cm2 |
Damage threshold |
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50W/cm2 / 0.1J/cm2 with all filters installed for <100ns pulse width(3) |
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Dimensions and CCD recess |
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96mm x 76mm x 16mm |
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96mm x 76mm x 23mm |
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CCD recess: 4.5mm below surface |
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CCD recess: 4.5mm below surface |
Image quality at 1064nm |
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Pulsed with trigger sync - excellent |
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Pulsed with trigger sync - excellent |
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Pulsed with video trigger - good |
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Pulsed with video trigger - good |
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CW - poor |
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CW - good |
Operation mode |
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Interline transfer progressive scan CCD |
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Software supported |
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BeamGage |
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PC interface |
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USB 2.0 |
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L11059
36mm x 24mm, 35mm format for large dia. beams, CW & pulsed lasers,
ideal for CW YAG, Adjustable ROI 190 - 1100nm (2)
35mm x 24mm 9.0µm x 9.0µm 4008 x 2672 59 dB
±1%
3.1 fps at full resolution higher rates with binning and smaller region of interest
10us to multiple frame times
Supports both Trigger In and Strobe Out
N/A 0.15µW/cm2 0.17nW/cm2 0.15mW/cm2
83mm x 76mm x 128mm CCD recess: 18.8mm below bezel, 31.75 from ND filter holder
Pulsed with trigger sync - excellent Pulsed with video trigger - good CW - good
Notes: |
(1) Camera set to full resolution at maximum frame rate and exposure times, running CW at 632.8nm wavelength. Camera set to |
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minimum useful gain for saturation test and maximum useful gain for lowest signal test. |
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(2) May be useable for wavelengths below 350nm but sensitivity is low and detector deterioration may occur. Therefore UV image converter is |
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recommended. Although our silicon cameras have shown response out to 1320nm it can cause significant blooming which could lead to |
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significant errors of beam width measurement. We would suggest our XC130 InGaAs camera for these wavelengths to give you the best |
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measurements. |
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(3) This is the damage threshold of the filter glass of the filters. Assuming all filters mounted with ND1 (red housing) filter in the front. Distortion of |
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the beam may occur with average power densities as low as 5W/cm2. |
3.2.4.1 Beam Analysis
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3.2.4.2 Beam Analysis
3.2.4.2 190-1100nm Firewire Silicon CCD Cameras
Models GRAS 20
Features
ֺ GRAS 20
61dB true system dynamic range (14 bit with BeamGage) ֺ High speed electronic shutters
ֺ Exclusive Ultracal available for ISO conforming accuracy
ֺ Flexible external trigger and strobe output for synchronization with laser pulses
ֺ Available with BeamGage software
GRAS 20/GRAS 20-1550 |
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44 |
DUAL IEEE-1394b PORTS |
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65 |
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ACTIVE AREA |
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7.1 x 5.4 |
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35 |
29 |
17.5 |
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ACTIVE AREA |
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TRIGGER / SERIAL PORT |
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1"-32 UN |
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(C-Mount) |
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Firewire Cameras for use with Laptop or Desktop PC
Item |
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Specification |
Model |
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GRAS 20 |
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Application |
1/1.8” format, high resolution, CW YAG, adjustable ROI |
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Spectral Response |
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190 – 1100nm(3) |
Maximum beam size |
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7.1mm W x 5.4mm H |
Pixel spacing |
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4.4µm x 4.4µm |
Number of effective pixels |
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1600 x 1200 |
Minimum system dynamic range(1) |
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61dB |
Linearity with Power |
±1% |
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Accuracy of beam width |
±2% |
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Frame rates |
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15Hz full res; >60Hz depending on ROI(2) |
Shutter duration |
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From 1/frame rate to 1/10,000s. Manual or continuous automatic control |
Gain control |
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0db to 25db Manual control |
Trigger |
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Supports both trigger in and strobe out |
Photodiode trigger |
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Optional photodiode trigger available: ESP-GRAS |
Saturation intensity(1) |
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0.3µW/cm2 |
Lowest measurable signa(1) |
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0.4nW/cm2 |
Damage threshold |
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50W/cm2 / 1J/cm2 with all filters installed for <100ns pulse width(4) |
Dimensions and CCD recess |
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35mm x 44mm x 65mm Fixed C-mount |
Image quality at 1064nm |
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Pulsed with video trigger - good Pulsed, sync - excellent CW - good |
Operation mode |
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Interline transfer progressive scan CCD |
Software supported |
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BeamGage |
PC interface |
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IEEE 1394b Firewire |
Minimum host system requirements |
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IEEE 1394b requires 1394b port or PCI-Express or CardBus Slot |
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Notes: |
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(1) Camera set to full resolution at maximum frame rate and equivalent exposure times, running CW at 632.8nm wavelength. Camera set to |
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minimum useful gain for saturation test and maximum useful gain for lowest signal test. |
(2)The maximum rate depends on the ROI (Region of Interest) size, the bits readout, and the number of cameras on the same bus. The SCOR 20 operates at 7.5Hz 12 bits and 15Hz 8 bits. It operates up to at least 60Hz with a smaller ROI. The frame rate also depends on PC resources.
(3)May be usable for wavelengths below 350nm but sensitivity is low and detector deterioration may occur.
Therefore UV image converter is recommended. Although our silicon cameras have shown response out to 1320nm it can cause significant blooming which could lead to significant errors of beam width measurement. We would suggest our XC130 InGaAs camera for these wavelengths to give you the best measurements.
(4)This is the damage threshold of the filter glass of the filters. Assuming all filters mounted with ND1 (red housing) filter in the front. Distortion of the beam may occur.
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3.2.4.3 190-1100nm Gig-E Silicon CCD Cameras
Models Gevicam
Features
ֺ Gevicam
Ethernet compatible
ֺNetwork multiple cameras, multiple versions of BeamGage
ֺLong cable distances
ֺHigh speed image acquisition
ֺExternal trigger for synchronization with laser pulses
Gevicam
Gig-E Cameras for use with Laptop or Desktop PC
Item |
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Specification |
Model |
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Gevicam |
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Application |
1/1.8” format, high resolution, networkable, long cable distances, adjustable ROI |
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Spectral Response |
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190 - 1100nm* |
Maximum beam size |
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7.16mm (H) x 5.44mm (V) |
Pixel spacing |
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4.4µm x 4.4µm |
Number of effective pixels |
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1600 x 1200 |
Minimum system dynamic range(1) |
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~57dB full speed, full resolution, min gain |
Linearity with Power |
±1% |
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Accuracy of beam width |
±2% |
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Frame rates |
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17fps @ full resolution /7.5fps optional; faster rates with binning |
Shutter duration |
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60ms @ 17fps; 133ms @ 7.5fps |
Gain control |
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33dB |
Trigger |
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5V TTL 2µsec min, positive pulse, rising edge triggered |
Photodiode trigger |
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N/A |
Saturation intensity(1) |
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0.3µW/cm2 |
Lowest measurable signa(1) |
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0.5lux @ 17fps |
Damage threshold |
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50W/cm2 / 0.1J/cm2 with all filters installed for <100ns pulse width(3) |
Dimensions and CCD recess |
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34mm x 34mm x 69mm CCD recess: 17.5mm below surface |
Image quality at 1064nm |
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Pulsed with video trigger - good, Pulsed sync - excellent, CW - good |
Operation mode |
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Inline transfer progressive scan |
Software supported |
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BeamGage - Enterprise |
PC interface |
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Gigbit ethernet |
Minimum host system requirements |
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PC desktop with PCI-Express slot or laptop with PCI-Express/34 slot |
Windows OS support |
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Windows 7 (32/64) or Vista (32/74) |
Notes: |
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(1) Camera set to full resolution at maximum frame rate and equivalent exposure times, running CW at 632.8nm wavelength. Camera set to |
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minimum useful gain for saturation test and maximum useful gain for lowest signal test. |
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(2) The maximum rate depends on the ROI (Region of Interest) size, the bits readout, and the number of cameras on the same bus. The SCOR 20 |
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operates at 7.5Hz 12 bits and 15Hz 8 bits. It operates up to at least 60Hz with a smaller ROI. The frame rate also depends on PC resources. |
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(3) May be usable for wavelengths below 350nm but sensitivity is low and detector deterioration may occur. |
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Therefore UV image converter is recommended. Although our silicon cameras have shown response out to 1320nm it can cause significant |
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blooming which could lead to significant errors of beam width measurement. We would suggest our XC130 InGaAs camera for these |
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wavelengths to give you the best measurements. |
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(4) This is the damage threshold of the filter glass of the filters. Assuming all filters mounted with ND1 (red housing) filter in the front. Distortion |
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of the beam may occur. |
3.2.4.3 Beam Analysis
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01.04.2014 |
3.2.4.4 1440-1605nm Phosphor Coated CCD Cameras For NIR Response
Features
ֺ1440-1605 nm Wavelengths
ֺNIR Telecom mode field analysis
ֺNIR Laser beam analysis
Available Models |
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ֺ |
USB models: |
SP503U-1550 |
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ֺ |
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SP620U-1550 |
SP-1550M |
Firewire models: GRAS20-1550 |
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ֺ |
Analog Camera: SP-1550M |
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Phosphor Coating Technology
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SP503U-1550 |
GRAS20-1550 |
SP620U-1550 |
The up-conversion from NIR to visible light in the 1550 series cameras is nonlinear.
The anti-Stokes phosphor coating produces visible photons at a rate roughly the square of the input signal. This is shown dramatically where the camera total output increases dramatically faster than a linear output shown in the bottom line. The CCD camera saturation in the center of a beam, the up-converted visible signal drops as the square of the input signal. Thus the lower signal wings of a beam are suppressed, resulting in the appearance and measurement of a beam width much smaller than actual.
1550nm Fiber Output |
1610nm OPO Output |
This illustration is a comparison of the cross-section of a beam with and without correction. As seen, the real width of the beam is much greater than would be observed without correction.
Analysis |
Non-Linearity of SP-1550M Camera at 1550nm |
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SP-1550M Camera: Comparison of Beam Shape |
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with and without Correction Factor |
Beam |
Uncorrected Peak Signal |
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Linear From Min Signal |
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counts |
Counts |
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3.2.4.4 |
digitalinsignalOutput |
DigitalinMagnitude |
Beam Width |
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With Correction, width=86 Pixels |
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Without Correction, width = 58 Pixels |
Total input Power in uW
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Beam Width in Pixels |
Non-linear output of the 1550 series cameras. |
Cross-section of a fiber beam with and without |
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non-linearity correction. |
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Wavelength Response
The anti-Stokes up-conversion efficiency is very wavelength dependent. This graph shows the typical spectral response curve of a new, high response coating. As seen, we have calibrated the response from 1527nm to 1605nm. We have extrapolated the shorter wavelength region by comparing our measured response to data published over the entire range.
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Phosphor Coated CCD Response |
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Video |
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for Full |
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mW/cm 2 |
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Measured |
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Signal required versus wavelength to achieve |
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Extrapolated from |
camera full signal illumination |
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Published Data |
by anti-Stokes up conversion material. |
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1460 |
1470 |
1480 |
1490 |
1500 |
1510 |
1520 |
1530 |
1540 |
1550 |
1560 |
1570 |
1580 |
1590 |
1600 |
1610 |
Wa velength (nm)
Phosphor Coated Cameras with Spiricon's BeamGage software
Spiricon's engineers have carefully measured the non-linearity of the signal generated by the Phosphor Coated series cameras. The software in the BeamGage incorporates an algorithm to correct for the non-linearity. This illustration shows the linearity obtained, showing in the top line that the low level signals drop linearly, rather than at the square of the input, seen in the lower line.
The two photos show the uncorrected and corrected camera beam shape in 3D. See the BeamGage section for additional information on the beam analyzer.
Beam profile of a fiber beam with |
Beam profile of a fiber beam without |
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non-linearity correction. |
non-linearity correction. |
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3.2.4.4 Beam Analysis
SP-1550M; RS-170 monitor display when used without a frame grabber.
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3.2.4.4 Beam Analysis
148
Specifications: Phosphor Coated For NIR Response
Model |
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SP503U-1550 |
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SP620U-1550 |
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GRAS20-1550 |
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SP-1550M |
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Application |
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NIR wavelengths, ½" format, |
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NIR wavelengths, 1/1.8" for- |
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NIR wavelengths, 1/1.8" |
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NIR wavelengths, ½" format |
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low resolution |
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mat, low resolution, adjustable |
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format, adjustable ROI |
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ROI and binning |
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Spectral Response |
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1440 - 1605nm |
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1440 - 1605nm |
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1440 - 1605nm |
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1440 - 1605nm |
Maximum beam size |
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6.3mm W x 4.7mm H |
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7.1mm W x 5.4mm H |
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7.1mm x 5.4mm |
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4.7mm x 5.4mm |
Pixel spacing (1) |
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9.9μm x 9.9μm |
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4.4μm x 4.4μm |
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4.4μm x 4.4μm |
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8.4μm x 9.8μm |
Number of effective pixels |
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640 x 480 |
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1600 x 1200 |
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1600 x 1200 |
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640 x 480 pixels |
Minimum system |
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~30 dB |
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~30 dB |
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~30dB |
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~30dB |
dynamic range (2) |
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Linearity with Power |
±5% |
±5% |
±5% |
±5% |
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Spatial Uniformity |
±5% |
±5% |
±5% |
±5% |
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Accuracy of beam width |
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±5% for beams larger than 0.6 mm |
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Frame rates |
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30 fps at full resolution |
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8 fps at full resolution |
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15Hz full res |
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30 Hz |
In 12 bit mode (3) |
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60 fps at 320x240 |
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28 fps at 640x480 |
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>60Hz with smaller ROI (3) |
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Shutter duration |
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30μs to multiple frame times |
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44 fps at 320x240 |
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1/60 to 1/100,000 sec, 9 steps |
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Gain control |
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43:1 manual |
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29:1 manual |
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0db to 25db Manual control |
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Manual adjustment |
Trigger |
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Supports both Trigger In and Strobe Out |
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N/A |
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Photodiode trigger |
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Consult Factory |
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N/A (consult factory) |
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N/A |
Saturation intensity |
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7mW/cm2 at 1550 nm |
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Lowest measurable signal |
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~ 50μW/cm2 |
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Damage threshold |
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50W/cm2/0.1J/cm2 with all filters installed for <100ns pulse width(4) |
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70 mW/cm2 at 1550 nm |
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70 mW/cm2 at 1550 nm |
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Dimensions and CCD |
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96X76X16mm; 4.5mm below |
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96X76X28mm; 4.5mm below |
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20mm x 44mm x 58mm Fixed |
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37mm x 34mm x 56mm CCD |
recess |
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surface |
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surface |
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C-mount |
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recess from surface 12.5mm, |
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Adjustable |
Operation mode |
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Interline transfer progressive scan CCD |
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Interline transfer progressive |
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Interline Transfer interlaced |
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scan CCD |
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CCD |
Software supported |
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BeamGage |
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BeamGage |
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PC interface |
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USB 2.0 |
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IEEE 1394b |
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Host system requirements |
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IEEE 1394 port or PCI-Express |
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or CardBus Slot |
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Notes: |
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(1) Despite the small pixel size, the spatial resolution will not exceed 50μm due to diffusion of the light by the phosphor coating. |
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(2)Signal to noise ratio is degraded due to the gamma of the phosphor’s response. Averaging or summing of up to 256 frames improves dynamic range by up to 16x = +24dB.
(3)In normal (non-shuttered) camera operation, the frame rate is the fastest rate at which the laser may pulse and the camera can still separate one pulse from the next. With electronic shutter operation, higher rate laser pulses can be split out by matching the laser repetition to the shutter speed.
(4)This is the damage threshold of the filter glass of the filters. Assuming all filters mounted with ND1 (red housing) filter in the front. Distortion of the beam may occur with average power densities as low as 5W/cm2.
01.01.2014 |
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For latest updates please visit our website: www.ophiropt.com/photonics |
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